[R] Loading multiple packages with install.packages()...

[Ben Bolker]

   Continuing with this approach:

a1 <- available.packages()
packages <- grep("^rcmdrplugin", rownames(a1), ignore.case = TRUE, value 
= TRUE)
missing_pkgs <- setdiff(packages, rownames(installed.packages()))
install.packages(missing_pkgs, dependencies = TRUE)

   The pacman package also handles some of these "install only if not 
already installed" tasks.

On 2024-09-23 12:40 p.m., Ebert,Timothy Aaron wrote:
> If you can get a vector with all the package names (I do not know how to do this) then you could do something like this;
> # Function to check and install missing packages
> install_if_missing <- function(pkg) {
>    if (!require(pkg, character.only = TRUE)) {
>      install.packages(pkg, dependencies = TRUE)
>    }
>    library(pkg, character.only = TRUE)
> }
> # List of required packages.
> packages <- c("emmeans", "multcomp", "sandwich", "multcompView", "ggplot2", "stringr", "dplyr", "openxlsx", "tidyr")
> # Check and install each package
> lapply(packages, install_if_missing)
> 
> 
> Regards,
> Tim
> -----Original Message-----
> From: R-help <r-help-bounces using r-project.org> On Behalf Of Brian Lunergan
> Sent: Monday, September 23, 2024 12:35 PM
> To: r-help using r-project.org
> Subject: [R] Loading multiple packages with install.packages()...
> 
> [External Email]
> 
> Hi folks:
> 
> Curious question. I've added Rcmdr to my setup (R 4.4.1). I would like to add all of the plugins. Is there a way to get install.packages() to gather up everything starting 'rcmdrplugin', or do I have to list each package individually between the brackets?? 😕️
> 
> Regards...
> 
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-- 
Dr. Benjamin Bolker
Professor, Mathematics & Statistics and Biology, McMaster University
Director, School of Computational Science and Engineering
> E-mail is sent at my convenience; I don't expect replies outside of
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